Philip muller



(No Model.)

- 1P. MULLER.

FILTER.

180.395.291. Patented Dee. 25, 1888.

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PHILIP MLLER, OF NEYYORK, N. Y.

FILTER.

SPECIFICATION forming part of Letters Patent No. 395,291, dated December 25, 1888.

Application filed October 27, 1888. Serial No. 289,350. (No model.)

To all whom, it may concern:

Be it known that I, PHILIP MLLER, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Filters, of which the following is a specification.

This invention relates to a filter which is intended particularly for drawing lager-beer from the fermenting-casks into kegs; but my filter can also be used for other liquids under pressure.

The peculiar and novel construction of my filter is pointed out in the following,` specification and claim, and illustrated in the accompanying drawings, in whichn Figure l represents a longitudinal central section. 'Fig'. 2 is a transverse section in the plane Qc a, Fig. l.

Similar letters indicate corresponding parts.

ln the drawings, the letter A designates -a case which is by preference made cylindrical and of metal sufficiently strong to withstand the pressure to which it may be eX- posed. lVhen the filter is to be used for beer, l make the ease of sheet-copper, coated on its inner surface with tin, so that it is not liable to eorrode by the action of the beer. On one end of this case is firmly secured a head, l?, which. is provided with an opening, (t, and with a suitable coupling, so that it can be readily connected. to the liquid-supply pipe. 0n the opposite end of the head is firmly sccured the head C, which is provided with an opening, b, and with a screw-nipple, c, so that the liquid-discharge pipe can be readily connected to the same. Both heads are secured to the case in such a manner that they can be readily removed in order to obtain access to the interior ofthe case. Suitable packing'- rings, cl c, insure tight joints between the heads and the case.

D is a strainer, which is made of foraminous sheetmetal, of sufficient strength to withstand the pressure to which it may be exposed. lt is closed at the end facing the supply-head B and. open at its opposite end, which is :firmly secured to the discharge-head C. For the purpose of making the connection between the strainer and the discharge-head C, the latter is provided with an internal flange, f,

having a screw-thread on its iniler surface, and the strainer is provided at its open end with an external screw-thread to engage the thread of the flange f. A packing-rin g, g, insures a tight joint.

Over the strainer D is placed a filteringbag, E, which is composed of an inner layer of perforated sheet metal, or wire-gauze, and of an outer layer (one or more) of cloth, felt, or other equivalent material, and which is closed at its bottom. sented in the drawings l have shown two filtering-bags, one over the oth er, but in some cases a single filtering-bag will be sufficient. The filtering-bag is retained in position on the strainer by a clamping-ring, 7L.

The liquid to be filtered is drawn from receptacles-such for instance, as fermentingcasks of lager-beer-under a pressure of from five to ten pounds to the square inch, and as it enters the case A through the supply-opening ct, it fills the annular space between the outer surface of the filtering-bag and the inner surface of the ease, and it is gradually forced through the different layers of the tiltering-bag into the interior of the strainer D, whence it escapes through the discharge- Opening lt is obvious that the impurities contained in the liquid as the same enters the case A are retained by the filtering bag or bags, and the liquid which discharges through the opening b is practically free from impurities. lf the filtering bag orbagshave become surcharged with impurities, they can be readily removed from the case A and cleansed by washing or otherwise.

In using my filter for lager-beer I have found that when the commuiiication between the ease A and the fermenting-cash is first opened the filter becomes filled with foam, and I have provided the ease C with a cock, l?, which at the beginning is opened until no more foam appears.

NV hat l claim as new, and desire to secure by Letters Patent, is-

The combination of the casing A, having at one end the supply-head B, provided with the receiving-opening a, and at the opposite end the discharge-head C, provided with the discharging-opening l), the tubular strainer D, closed at one end opposite the receiving-openln the example repre- IOO ing` in the supply-head and having its other ing of vthe Supply-head, substantially as de 1o end open and Secured to the discharge-head scribed.

around the discharging-opening therein7 and In testimony whereof I have hereunto set a Itering-bag, E, inelosing the sides and the my hand and seal in the presence of two subeIoSed end of the tubular strainer, secured at seribing Witnesses.

its open end upon the strainer around its open PHILIP MULLER. [L S.] discharging end and comprising' a closed end I/Vitnesses:

lying against the Closed end of the tubular WV. C. IIAUFF,

strainer directly opposite the reeeiVing-open- E. F. KASTENHUBER. 

